[PATCH v2 0/4] Add support for the eDP panel on sc7280 CRD

[PATCH v2 0/4] Add support for the eDP panel on sc7280 CRD

[Sankeerth Billakanti]

Add support for the eDP panel on sc7280 CRD platform. The eDP panel does
not need HPD line for connect disconnect. So, this series will report eDP
as always connected. The driver needs to register for IRQ_HPD only for eDP.
This support will be added later.

These changes are dependent on the following series:
https://patchwork.kernel.org/project/linux-arm-msm/list/?series=586263&archive=both&state=*
https://patchwork.kernel.org/project/linux-arm-msm/list/?series=560587&state=%2A&archive=both

Sankeerth Billakanti (4):
  dt-bindings: display: simple: Add sharp LQ140M1JW46 panel
  arm64: dts: qcom: sc7280: Add support for eDP panel on CRD
  drm/panel-edp: Add eDP sharp panel support
  drm/msm/dp: Add driver support to utilize drm panel

 .../bindings/display/panel/panel-simple.yaml       |   2 +
 arch/arm64/boot/dts/qcom/sc7280-crd.dts            | 122 +++++++++++++++++++++
 arch/arm64/boot/dts/qcom/sc7280.dtsi               |   2 -
 drivers/gpu/drm/msm/dp/dp_display.c                |   8 ++
 drivers/gpu/drm/msm/dp/dp_drm.c                    |  54 ++++++++-
 drivers/gpu/drm/msm/dp/dp_parser.h                 |   3 +
 drivers/gpu/drm/panel/panel-edp.c                  |  31 ++++++
 7 files changed, 215 insertions(+), 7 deletions(-)

-- 
2.7.4

[PATCH v2 1/4] dt-bindings: display: simple: Add sharp LQ140M1JW46 panel

[Sankeerth Billakanti]

Add support for sharp LQ140M1JW46 display panel. It is a 14" eDP panel
with 1920x1080 display resolution.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---
 Documentation/devicetree/bindings/display/panel/panel-simple.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
index 9cf5588..1eb9dd4 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
@@ -284,6 +284,8 @@ properties:
       - sharp,lq101k1ly04
         # Sharp 12.3" (2400x1600 pixels) TFT LCD panel
       - sharp,lq123p1jx31
+        # Sharp 14" (1920x1080 pixels) TFT LCD panel
+      - sharp,lq140m1jw46
         # Sharp LS020B1DD01D 2.0" HQVGA TFT LCD panel
       - sharp,ls020b1dd01d
         # Shelly SCA07010-BFN-LNN 7.0" WVGA TFT LCD panel
-- 
2.7.4

[PATCH v2 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Sankeerth Billakanti]

Enable the eDP display panel support without HPD on sc7280 platform.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---

Changes in v2:
  - sort node references alphabetically
  - improve readability
  - move the pwm pinctrl to pwm node
  - move the regulators to root
  - define backlight power
  - remove dummy regulator node
  - cleanup pinctrl definitions

 arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 -
 2 files changed, 122 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
index e2efbdd..bff2707 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
+++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
@@ -21,6 +21,34 @@
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
+
+	backlight_power: backlight-power {
+		compatible = "regulator-fixed";
+		regulator-name = "backlight_power";
+
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+
+		gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&edp_bl_power>;
+	};
+
+	edp_power: edp-power {
+		compatible = "regulator-fixed";
+		regulator-name = "edp_power";
+
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&edp_panel_power>;
+	};
 };
 
 &apps_rsc {
@@ -76,6 +104,42 @@ ap_ts_pen_1v8: &i2c13 {
 	};
 };
 
+&edp_out {
+	remote-endpoint = <&edp_panel_in>;
+};
+
+&mdss {
+	status = "okay";
+};
+
+&mdss_edp {
+	status = "okay";
+
+	vdda-1p2-supply = <&vreg_l6b_1p2>;
+	vdda-0p9-supply = <&vreg_l10c_0p8>;
+};
+
+&mdss_edp_phy {
+	status = "okay";
+
+	vdda-1p2-supply = <&vreg_l6b_1p2>;
+	vdda-0p9-supply = <&vreg_l10c_0p8>;
+};
+
+&mdss_dp {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&dp_hot_plug_det>;
+	data-lanes = <0 1>;
+	vdda-1p2-supply = <&vreg_l6b_1p2>;
+	vdda-0p9-supply = <&vreg_l1b_0p8>;
+};
+
+&mdss_mdp {
+	status = "okay";
+};
+
 &nvme_3v3_regulator {
 	gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
 };
@@ -84,7 +148,65 @@ ap_ts_pen_1v8: &i2c13 {
 	pins = "gpio51";
 };
 
+&pm8350c_pwm {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&edp_bl_pwm>;
+};
+
+&pm8350c_gpios {
+	edp_bl_power: edp-bl-power {
+		pins = "gpio7";
+		function = "normal";
+		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
+		bias-disable;
+		output-low;
+	};
+
+	edp_bl_pwm: edp-bl-pwm {
+		pins = "gpio8";
+		function = "func1";
+		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
+		bias-disable;
+		output-low;
+	};
+};
+
+&soc {
+	edp_backlight: edp-backlight {
+		compatible = "pwm-backlight";
+
+		power-supply = <&backlight_power>;
+		pwms = <&pm8350c_pwm 3 65535>;
+	};
+
+	edp_panel: edp_panel {
+		compatible = "sharp,lq140m1jw46";
+
+		power-supply = <&edp_power>;
+		backlight = <&edp_backlight>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			port@0 {
+				reg = <0>;
+				edp_panel_in: endpoint {
+					remote-endpoint = <&edp_out>;
+				};
+			};
+		};
+	};
+};
+
 &tlmm {
+	edp_panel_power: edp-panel-power {
+		pins = "gpio80";
+		function = "gpio";
+		bias-pull-down;
+	};
+
 	tp_int_odl: tp-int-odl {
 		pins = "gpio7";
 		function = "gpio";
diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index 3572399..f8fa716 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -3012,8 +3012,6 @@
 
 			mdss_edp: edp@aea0000 {
 				compatible = "qcom,sc7280-edp";
-				pinctrl-names = "default";
-				pinctrl-0 = <&edp_hot_plug_det>;
 
 				reg = <0 0xaea0000 0 0x200>,
 				      <0 0xaea0200 0 0x200>,
-- 
2.7.4

Re: [PATCH v2 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Matthias Kaehlcke]

On Tue, Feb 08, 2022 at 08:48:43PM +0530, Sankeerth Billakanti wrote:
> Enable the eDP display panel support without HPD on sc7280 platform.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
> 
> Changes in v2:
>   - sort node references alphabetically
>   - improve readability
>   - move the pwm pinctrl to pwm node
>   - move the regulators to root
>   - define backlight power
>   - remove dummy regulator node
>   - cleanup pinctrl definitions
> 
>  arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 -
>  2 files changed, 122 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> index e2efbdd..bff2707 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -21,6 +21,34 @@
>  	chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
> +
> +	backlight_power: backlight-power {

nit: the other fixed regulator in sc7280-idp.dtsi is called
'nvme_3v3_regulator', if you wanted to be consistent you
could call this backlight_3v3_regulator.

> +		compatible = "regulator-fixed";
> +		regulator-name = "backlight_power";
> +
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_bl_power>;
> +	};
> +
> +	edp_power: edp-power {

nit: see above

> +		compatible = "regulator-fixed";
> +		regulator-name = "edp_power";
> +
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_panel_power>;
> +	};
>  };
>  
>  &apps_rsc {
> @@ -76,6 +104,42 @@ ap_ts_pen_1v8: &i2c13 {
>  	};
>  };
>  
> +&edp_out {
> +	remote-endpoint = <&edp_panel_in>;
> +};
> +
> +&mdss {
> +	status = "okay";
> +};
> +
> +&mdss_edp {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_edp_phy {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_dp {

should be before 'mdss_edp'.

> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&dp_hot_plug_det>;
> +	data-lanes = <0 1>;
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l1b_0p8>;
> +};
> +
> +&mdss_mdp {
> +	status = "okay";
> +};
> +
>  &nvme_3v3_regulator {
>  	gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
>  };
> @@ -84,7 +148,65 @@ ap_ts_pen_1v8: &i2c13 {
>  	pins = "gpio51";
>  };
>  
> +&pm8350c_pwm {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&edp_bl_pwm>;
> +};
> +
> +&pm8350c_gpios {

should be before 'pm8350c_pwm'

> +	edp_bl_power: edp-bl-power {
> +		pins = "gpio7";
> +		function = "normal";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +
> +	edp_bl_pwm: edp-bl-pwm {
> +		pins = "gpio8";
> +		function = "func1";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +};
> +
> +&soc {
> +	edp_backlight: edp-backlight {
> +		compatible = "pwm-backlight";
> +
> +		power-supply = <&backlight_power>;
> +		pwms = <&pm8350c_pwm 3 65535>;
> +	};
> +
> +	edp_panel: edp_panel {

in difference to labels node names should use dashes as separator, not
underscores (i.e. 'edp-panel')

> +		compatible = "sharp,lq140m1jw46";
> +
> +		power-supply = <&edp_power>;
> +		backlight = <&edp_backlight>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			port@0 {
> +				reg = <0>;
> +				edp_panel_in: endpoint {
> +					remote-endpoint = <&edp_out>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
>  &tlmm {
> +	edp_panel_power: edp-panel-power {
> +		pins = "gpio80";
> +		function = "gpio";
> +		bias-pull-down;
> +	};
> +
>  	tp_int_odl: tp-int-odl {
>  		pins = "gpio7";
>  		function = "gpio";
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3572399..f8fa716 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -3012,8 +3012,6 @@
>  
>  			mdss_edp: edp@aea0000 {
>  				compatible = "qcom,sc7280-edp";
> -				pinctrl-names = "default";
> -				pinctrl-0 = <&edp_hot_plug_det>;

This was just added a few days ago by commit 118cd3b8ec0d ("arm64: dts: qcom:
sc7280: Add edp_out port and HPD lines"). The patch assumes that the 'Hot
Plug Detect line (which functions as "panel ready" in eDP) is highly likely
to be used by boards.'. If that is indeed the case and the CRD is the
exception then it seems that deleting the two properties from the CRD DT
would be a better solution.

RE: [PATCH v2 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Sankeerth Billakanti (QUIC)]

Hi Matthias,

I will implement the changes.

Thank you,
Sankeerth

-----Original Message-----
From: Matthias Kaehlcke <mka@chromium.org> 
Sent: Wednesday, February 9, 2022 3:54 AM
To: Sankeerth Billakanti (QUIC) <quic_sbillaka@quicinc.com>
Cc: dri-devel@lists.freedesktop.org; linux-arm-msm@vger.kernel.org; freedreno@lists.freedesktop.org; linux-kernel@vger.kernel.org; devicetree@vger.kernel.org; agross@kernel.org; bjorn.andersson@linaro.org; robh+dt@kernel.org; robdclark@gmail.com; seanpaul@chromium.org; swboyd@chromium.org; dianders@chromium.org; krzysztof.kozlowski@canonical.com; thierry.reding@gmail.com; sam@ravnborg.org; airlied@linux.ie; daniel@ffwll.ch; quic_kalyant <quic_kalyant@quicinc.com>; Abhinav Kumar (QUIC) <quic_abhinavk@quicinc.com>; Kuogee Hsieh (QUIC) <quic_khsieh@quicinc.com>; quic_mkrishn <quic_mkrishn@quicinc.com>
Subject: Re: [PATCH v2 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

On Tue, Feb 08, 2022 at 08:48:43PM +0530, Sankeerth Billakanti wrote:
> Enable the eDP display panel support without HPD on sc7280 platform.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
> 
> Changes in v2:
>   - sort node references alphabetically
>   - improve readability
>   - move the pwm pinctrl to pwm node
>   - move the regulators to root
>   - define backlight power
>   - remove dummy regulator node
>   - cleanup pinctrl definitions
> 
>  arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 -
>  2 files changed, 122 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts 
> b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> index e2efbdd..bff2707 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -21,6 +21,34 @@
>  	chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
> +
> +	backlight_power: backlight-power {

nit: the other fixed regulator in sc7280-idp.dtsi is called 'nvme_3v3_regulator', if you wanted to be consistent you could call this backlight_3v3_regulator.

> +		compatible = "regulator-fixed";
> +		regulator-name = "backlight_power";
> +
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_bl_power>;
> +	};
> +
> +	edp_power: edp-power {

nit: see above

> +		compatible = "regulator-fixed";
> +		regulator-name = "edp_power";
> +
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_panel_power>;
> +	};
>  };
>  
>  &apps_rsc {
> @@ -76,6 +104,42 @@ ap_ts_pen_1v8: &i2c13 {
>  	};
>  };
>  
> +&edp_out {
> +	remote-endpoint = <&edp_panel_in>;
> +};
> +
> +&mdss {
> +	status = "okay";
> +};
> +
> +&mdss_edp {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_edp_phy {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_dp {

should be before 'mdss_edp'.

> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&dp_hot_plug_det>;
> +	data-lanes = <0 1>;
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l1b_0p8>;
> +};
> +
> +&mdss_mdp {
> +	status = "okay";
> +};
> +
>  &nvme_3v3_regulator {
>  	gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
>  };
> @@ -84,7 +148,65 @@ ap_ts_pen_1v8: &i2c13 {
>  	pins = "gpio51";
>  };
>  
> +&pm8350c_pwm {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&edp_bl_pwm>;
> +};
> +
> +&pm8350c_gpios {

should be before 'pm8350c_pwm'

> +	edp_bl_power: edp-bl-power {
> +		pins = "gpio7";
> +		function = "normal";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +
> +	edp_bl_pwm: edp-bl-pwm {
> +		pins = "gpio8";
> +		function = "func1";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +};
> +
> +&soc {
> +	edp_backlight: edp-backlight {
> +		compatible = "pwm-backlight";
> +
> +		power-supply = <&backlight_power>;
> +		pwms = <&pm8350c_pwm 3 65535>;
> +	};
> +
> +	edp_panel: edp_panel {

in difference to labels node names should use dashes as separator, not underscores (i.e. 'edp-panel')

> +		compatible = "sharp,lq140m1jw46";
> +
> +		power-supply = <&edp_power>;
> +		backlight = <&edp_backlight>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			port@0 {
> +				reg = <0>;
> +				edp_panel_in: endpoint {
> +					remote-endpoint = <&edp_out>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
>  &tlmm {
> +	edp_panel_power: edp-panel-power {
> +		pins = "gpio80";
> +		function = "gpio";
> +		bias-pull-down;
> +	};
> +
>  	tp_int_odl: tp-int-odl {
>  		pins = "gpio7";
>  		function = "gpio";
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi 
> b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3572399..f8fa716 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -3012,8 +3012,6 @@
>  
>  			mdss_edp: edp@aea0000 {
>  				compatible = "qcom,sc7280-edp";
> -				pinctrl-names = "default";
> -				pinctrl-0 = <&edp_hot_plug_det>;

This was just added a few days ago by commit 118cd3b8ec0d ("arm64: dts: qcom:
sc7280: Add edp_out port and HPD lines"). The patch assumes that the 'Hot Plug Detect line (which functions as "panel ready" in eDP) is highly likely to be used by boards.'. If that is indeed the case and the CRD is the exception then it seems that deleting the two properties from the CRD DT would be a better solution.

Re: [PATCH v2 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Bjorn Andersson]

On Tue 08 Feb 07:18 PST 2022, Sankeerth Billakanti wrote:

> Enable the eDP display panel support without HPD on sc7280 platform.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
> 
> Changes in v2:
>   - sort node references alphabetically
>   - improve readability
>   - move the pwm pinctrl to pwm node
>   - move the regulators to root
>   - define backlight power
>   - remove dummy regulator node
>   - cleanup pinctrl definitions
> 
>  arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 -
>  2 files changed, 122 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> index e2efbdd..bff2707 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -21,6 +21,34 @@
>  	chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
> +
> +	backlight_power: backlight-power {
> +		compatible = "regulator-fixed";
> +		regulator-name = "backlight_power";
> +
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_bl_power>;
> +	};
> +
> +	edp_power: edp-power {
> +		compatible = "regulator-fixed";
> +		regulator-name = "edp_power";
> +
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_panel_power>;
> +	};
>  };
>  
>  &apps_rsc {
> @@ -76,6 +104,42 @@ ap_ts_pen_1v8: &i2c13 {
>  	};
>  };
>  
> +&edp_out {

Sorry for missing this while merging changes in sc7280.dtsi. But it
would be really nice if this was labeled mdss_edp_out instead (or
possibly defined within the &mdss_edp node).

Now you will have &edp_out and &dp_out floating around away from the edp
and dp nodes...

> +	remote-endpoint = <&edp_panel_in>;
> +};
> +
> +&mdss {
> +	status = "okay";
> +};
> +
> +&mdss_edp {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_edp_phy {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_dp {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&dp_hot_plug_det>;
> +	data-lanes = <0 1>;
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l1b_0p8>;
> +};
> +
> +&mdss_mdp {
> +	status = "okay";
> +};
> +
>  &nvme_3v3_regulator {
>  	gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
>  };
> @@ -84,7 +148,65 @@ ap_ts_pen_1v8: &i2c13 {
>  	pins = "gpio51";
>  };
>  
> +&pm8350c_pwm {

This label doesn't exist, so I won't be able to merge this patch.

> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&edp_bl_pwm>;
> +};
> +
> +&pm8350c_gpios {
> +	edp_bl_power: edp-bl-power {
> +		pins = "gpio7";
> +		function = "normal";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +
> +	edp_bl_pwm: edp-bl-pwm {
> +		pins = "gpio8";
> +		function = "func1";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +};
> +
> +&soc {
> +	edp_backlight: edp-backlight {
> +		compatible = "pwm-backlight";

This is not a device on the mmio bus, so it should not love within the
&soc.

> +
> +		power-supply = <&backlight_power>;
> +		pwms = <&pm8350c_pwm 3 65535>;
> +	};
> +
> +	edp_panel: edp_panel {

Ditto.

Regards,
Bjorn

> +		compatible = "sharp,lq140m1jw46";
> +
> +		power-supply = <&edp_power>;
> +		backlight = <&edp_backlight>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			port@0 {
> +				reg = <0>;
> +				edp_panel_in: endpoint {
> +					remote-endpoint = <&edp_out>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
>  &tlmm {
> +	edp_panel_power: edp-panel-power {
> +		pins = "gpio80";
> +		function = "gpio";
> +		bias-pull-down;
> +	};
> +
>  	tp_int_odl: tp-int-odl {
>  		pins = "gpio7";
>  		function = "gpio";
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3572399..f8fa716 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -3012,8 +3012,6 @@
>  
>  			mdss_edp: edp@aea0000 {
>  				compatible = "qcom,sc7280-edp";
> -				pinctrl-names = "default";
> -				pinctrl-0 = <&edp_hot_plug_det>;
>  
>  				reg = <0 0xaea0000 0 0x200>,
>  				      <0 0xaea0200 0 0x200>,
> -- 
> 2.7.4
> 

RE: [PATCH v2 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Sankeerth Billakanti (QUIC)]

Hi Bjorn,

1. I will change the edp_out label to mdss_edp_out.
2. The "pm8350c_pwm" node is part of the dependent series mentioned in the cover letter. Below is the patch for the same:
https://patchwork.kernel.org/project/linux-arm-msm/patch/1637917920-22041-4-git-send-email-quic_c_skakit@quicinc.com/
3. I will move the edp_backlight and edp_panel nodes to the root.

Thank you,
Sankeerth

-----Original Message-----
From: Bjorn Andersson <bjorn.andersson@linaro.org> 
Sent: Wednesday, February 9, 2022 5:23 AM
To: Sankeerth Billakanti (QUIC) <quic_sbillaka@quicinc.com>
Cc: dri-devel@lists.freedesktop.org; linux-arm-msm@vger.kernel.org; freedreno@lists.freedesktop.org; linux-kernel@vger.kernel.org; devicetree@vger.kernel.org; agross@kernel.org; robh+dt@kernel.org; robdclark@gmail.com; seanpaul@chromium.org; swboyd@chromium.org; dianders@chromium.org; krzysztof.kozlowski@canonical.com; thierry.reding@gmail.com; sam@ravnborg.org; airlied@linux.ie; daniel@ffwll.ch; quic_kalyant <quic_kalyant@quicinc.com>; Abhinav Kumar (QUIC) <quic_abhinavk@quicinc.com>; Kuogee Hsieh (QUIC) <quic_khsieh@quicinc.com>; quic_mkrishn <quic_mkrishn@quicinc.com>
Subject: Re: [PATCH v2 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

On Tue 08 Feb 07:18 PST 2022, Sankeerth Billakanti wrote:

> Enable the eDP display panel support without HPD on sc7280 platform.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
> 
> Changes in v2:
>   - sort node references alphabetically
>   - improve readability
>   - move the pwm pinctrl to pwm node
>   - move the regulators to root
>   - define backlight power
>   - remove dummy regulator node
>   - cleanup pinctrl definitions
> 
>  arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 -
>  2 files changed, 122 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts 
> b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> index e2efbdd..bff2707 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -21,6 +21,34 @@
>  	chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
> +
> +	backlight_power: backlight-power {
> +		compatible = "regulator-fixed";
> +		regulator-name = "backlight_power";
> +
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +
> +		gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_bl_power>;
> +	};
> +
> +	edp_power: edp-power {
> +		compatible = "regulator-fixed";
> +		regulator-name = "edp_power";
> +
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +
> +		gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
> +		enable-active-high;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&edp_panel_power>;
> +	};
>  };
>  
>  &apps_rsc {
> @@ -76,6 +104,42 @@ ap_ts_pen_1v8: &i2c13 {
>  	};
>  };
>  
> +&edp_out {

Sorry for missing this while merging changes in sc7280.dtsi. But it would be really nice if this was labeled mdss_edp_out instead (or possibly defined within the &mdss_edp node).

Now you will have &edp_out and &dp_out floating around away from the edp and dp nodes...

> +	remote-endpoint = <&edp_panel_in>;
> +};
> +
> +&mdss {
> +	status = "okay";
> +};
> +
> +&mdss_edp {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_edp_phy {
> +	status = "okay";
> +
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_dp {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&dp_hot_plug_det>;
> +	data-lanes = <0 1>;
> +	vdda-1p2-supply = <&vreg_l6b_1p2>;
> +	vdda-0p9-supply = <&vreg_l1b_0p8>;
> +};
> +
> +&mdss_mdp {
> +	status = "okay";
> +};
> +
>  &nvme_3v3_regulator {
>  	gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
>  };
> @@ -84,7 +148,65 @@ ap_ts_pen_1v8: &i2c13 {
>  	pins = "gpio51";
>  };
>  
> +&pm8350c_pwm {

This label doesn't exist, so I won't be able to merge this patch.

> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&edp_bl_pwm>;
> +};
> +
> +&pm8350c_gpios {
> +	edp_bl_power: edp-bl-power {
> +		pins = "gpio7";
> +		function = "normal";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +
> +	edp_bl_pwm: edp-bl-pwm {
> +		pins = "gpio8";
> +		function = "func1";
> +		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +		bias-disable;
> +		output-low;
> +	};
> +};
> +
> +&soc {
> +	edp_backlight: edp-backlight {
> +		compatible = "pwm-backlight";

This is not a device on the mmio bus, so it should not love within the &soc.

> +
> +		power-supply = <&backlight_power>;
> +		pwms = <&pm8350c_pwm 3 65535>;
> +	};
> +
> +	edp_panel: edp_panel {

Ditto.

Regards,
Bjorn

> +		compatible = "sharp,lq140m1jw46";
> +
> +		power-supply = <&edp_power>;
> +		backlight = <&edp_backlight>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			port@0 {
> +				reg = <0>;
> +				edp_panel_in: endpoint {
> +					remote-endpoint = <&edp_out>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
>  &tlmm {
> +	edp_panel_power: edp-panel-power {
> +		pins = "gpio80";
> +		function = "gpio";
> +		bias-pull-down;
> +	};
> +
>  	tp_int_odl: tp-int-odl {
>  		pins = "gpio7";
>  		function = "gpio";
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi 
> b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3572399..f8fa716 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -3012,8 +3012,6 @@
>  
>  			mdss_edp: edp@aea0000 {
>  				compatible = "qcom,sc7280-edp";
> -				pinctrl-names = "default";
> -				pinctrl-0 = <&edp_hot_plug_det>;
>  
>  				reg = <0 0xaea0000 0 0x200>,
>  				      <0 0xaea0200 0 0x200>,
> --
> 2.7.4
> 

[PATCH v2 3/4] drm/panel-edp: Add eDP sharp panel support

[Sankeerth Billakanti]

Add support for the 14" sharp,lq140m1jw46 eDP panel.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---

Changes in v2:
  - add mode when not using hpd
  - add delays
  - put dt-bindings

 drivers/gpu/drm/panel/panel-edp.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index a394a15..5d13ccc 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -1605,6 +1605,34 @@ static const struct panel_desc sharp_lq123p1jx31 = {
 	},
 };
 
+static const struct drm_display_mode sharp_lq140m1jw46_mode = {
+	.clock = 144370,
+	.hdisplay = 1920,
+	.hsync_start = 1920 + 48,
+	.hsync_end = 1920 + 48 + 32,
+	.htotal = 1920 + 48 + 32 + 80,
+	.vdisplay = 1080,
+	.vsync_start = 1080 + 3,
+	.vsync_end = 1080 + 3 + 5,
+	.vtotal = 1080 + 3 + 5 + 69,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static const struct panel_desc sharp_lq140m1jw46 = {
+	.modes = &sharp_lq140m1jw46_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 309,
+		.height = 174,
+	},
+	.delay = {
+		.hpd_absent = 80,
+		.enable = 50,
+		.unprepare = 500,
+	},
+};
+
 static const struct drm_display_mode starry_kr122ea0sra_mode = {
 	.clock = 147000,
 	.hdisplay = 1920,
@@ -1719,6 +1747,9 @@ static const struct of_device_id platform_of_match[] = {
 		.compatible = "sharp,lq123p1jx31",
 		.data = &sharp_lq123p1jx31,
 	}, {
+		.compatible = "sharp,lq140m1jw46",
+		.data = &sharp_lq140m1jw46,
+	}, {
 		.compatible = "starry,kr122ea0sra",
 		.data = &starry_kr122ea0sra,
 	}, {
-- 
2.7.4

[PATCH v2 4/4] drm/msm/dp: Add driver support to utilize drm panel

[Sankeerth Billakanti]

Add support in the DP driver to utilize the custom eDP panels
from drm/panels.

An eDP panel is always connected to the platform. So, the eDP
connector can be reported as always connected. The display mode
will be sourced from the panel. The panel mode will be set after
the link training is completed.

The eDP driver needs to register for IRQ_HPD only.
This support will be added later.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c |  8 ++++++
 drivers/gpu/drm/msm/dp/dp_drm.c     | 54 +++++++++++++++++++++++++++++++++----
 drivers/gpu/drm/msm/dp/dp_parser.h  |  3 +++
 3 files changed, 60 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 7cc4d21..410fda4 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1513,6 +1513,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
 		return -EINVAL;
 	}
 
+	/* handle eDP on */
+	if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
+		dp_hpd_plug_handle(dp_display, 0);
+
 	mutex_lock(&dp_display->event_mutex);
 
 	/* stop sentinel checking */
@@ -1577,6 +1581,10 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
 
 	dp_display = container_of(dp, struct dp_display_private, dp_display);
 
+	/* handle edp off */
+	if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
+		dp_hpd_unplug_handle(dp_display, 0);
+
 	mutex_lock(&dp_display->event_mutex);
 
 	/* stop sentinel checking */
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index d4d360d..12fa8c1 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -39,6 +39,10 @@ static enum drm_connector_status dp_connector_detect(struct drm_connector *conn,
 
 	dp = to_dp_connector(conn)->dp_display;
 
+	/* eDP is always  connected */
+	if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
+		return connector_status_connected;
+
 	DRM_DEBUG_DP("is_connected = %s\n",
 		(dp->is_connected) ? "true" : "false");
 
@@ -123,6 +127,35 @@ static enum drm_mode_status dp_connector_mode_valid(
 	return dp_display_validate_mode(dp_disp, mode->clock);
 }
 
+static int edp_connector_get_modes(struct drm_connector *connector)
+{
+	struct msm_dp *dp;
+
+	if (!connector)
+		return 0;
+
+	dp = to_dp_connector(connector)->dp_display;
+
+	return drm_bridge_get_modes(dp->panel_bridge, connector);
+}
+
+static enum drm_mode_status edp_connector_mode_valid(
+		struct drm_connector *connector,
+		struct drm_display_mode *mode)
+{
+	struct msm_dp *dp;
+
+	if (!connector)
+		return 0;
+
+	dp = to_dp_connector(connector)->dp_display;
+
+	if (mode->clock > EDP_MAX_PIXEL_CLK_KHZ)
+		return MODE_BAD;
+
+	return MODE_OK;
+}
+
 static const struct drm_connector_funcs dp_connector_funcs = {
 	.detect = dp_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
@@ -137,6 +170,12 @@ static const struct drm_connector_helper_funcs dp_connector_helper_funcs = {
 	.mode_valid = dp_connector_mode_valid,
 };
 
+static const struct drm_connector_helper_funcs edp_connector_helper_funcs = {
+	.get_modes = edp_connector_get_modes,
+	.mode_valid = edp_connector_mode_valid,
+
+};
+
 /* connector initialization */
 struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
 {
@@ -160,12 +199,17 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
 	if (ret)
 		return ERR_PTR(ret);
 
-	drm_connector_helper_add(connector, &dp_connector_helper_funcs);
+	if (dp_display->connector_type == DRM_MODE_CONNECTOR_eDP) {
+		drm_connector_helper_add(connector,
+				&edp_connector_helper_funcs);
+	} else {
+		drm_connector_helper_add(connector, &dp_connector_helper_funcs);
 
-	/*
-	 * Enable HPD to let hpd event is handled when cable is connected.
-	 */
-	connector->polled = DRM_CONNECTOR_POLL_HPD;
+		/*
+		 * Enable HPD to let hpd event is handled when cable is connected.
+		 */
+		connector->polled = DRM_CONNECTOR_POLL_HPD;
+	}
 
 	drm_connector_attach_encoder(connector, dp_display->encoder);
 
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 3172da0..58c4f27 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -17,6 +17,9 @@
 #define DP_MAX_PIXEL_CLK_KHZ	675000
 #define DP_MAX_NUM_DP_LANES	4
 
+/* Maximum validated clock */
+#define EDP_MAX_PIXEL_CLK_KHZ	285550
+
 enum dp_pm_type {
 	DP_CORE_PM,
 	DP_CTRL_PM,
-- 
2.7.4